v3.25.4
Leases (Right-of-Use Assets and Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Lessee, Lease, Description [Line Items]    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Net Property, Plant and Equipment Net Property, Plant and Equipment
Finance Lease, Right-of-Use Asset $ 249.8 $ 222.9
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Deferred charges and other Deferred charges and other
Operating Lease, Right-of-Use Asset $ 25.8 $ 26.4
Total leased assets $ 275.6 $ 249.3
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Long-Term Debt and Lease Obligation, Current Long-Term Debt and Lease Obligation, Current
Finance Lease, Liability, Current $ 19.7 $ 22.9
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other Liabilities, Current Other Liabilities, Current
Operating Lease, Liability, Current $ 9.7 $ 9.1
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Long-term Debt and Lease Obligation Long-term Debt and Lease Obligation
Finance Lease, Liability, Noncurrent $ 254.3 $ 223.3
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other Liabilities, Noncurrent Other Liabilities, Noncurrent
Operating Lease, Liability, Noncurrent $ 17.2 $ 18.2
Total Lease Liability $ 300.9 $ 273.5